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Are there disadvantages to using a generic varchar(255) for all text-based fields?
...single-byte content (e.g. ascii or latin1 characters). And likewise utf8mb4 character set causes the string to pad out to four bytes per character in memory.
So a VARCHAR(255) in utf8 storing a short string like "No opinion" takes 11 bytes on disk (ten lower-charset characters, plus one byte for l...
JavaScript displaying a float to 2 decimal places
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Jason McCrearyJason McCreary
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What is a NullPointerException, and how do I fix it?
...an sonar catch null pointer exceptions caused by JVM Dynamically
Now Java 14 has added a new language feature to show the root cause of NullPointerException. This language feature has been part of SAP commercial JVM since 2006. The following is 2 minutes read to understand this amazing language feat...
Apply multiple functions to multiple groupby columns
... similar dataframe as the one from above
df = pd.DataFrame(np.random.rand(4,4), columns=list('abcd'))
df['group'] = [0, 0, 1, 1]
df
a b c d group
0 0.418500 0.030955 0.874869 0.145641 0
1 0.446069 0.901153 0.095052 0.487040 0
2 0.843026 0.9361...
Warn user before leaving web page with unsaved changes
...cript>
Custom messages not supported everywhere
Do note that Firefox 4 didn't support custom messages in this dialog. As of april 2016, Chrome 51 is being rolled out in which custom messages are also being removed.
Some alternatives exist elsewhere on this site, but I think a dialog like thi...
How to get number of entries in a Lua table?
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answered Apr 24 '10 at 19:14
u0b34a0f6aeu0b34a0f6ae
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Copying files from host to Docker container
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How do you access command line arguments in Swift?
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answered Feb 27 at 23:34
pkambpkamb
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Replacing spaces with underscores in JavaScript?
... Crescent FreshCrescent Fresh
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bash/fish command to print absolute path to a file
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edited Aug 24 at 23:52
Boris
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